Battery device and preparation method thereof

Abstract

The invention discloses battery equipment and a preparation method thereof. The battery equipment comprises a box body, a battery assembly, a circuit assembly and a battery management system, the battery assembly is arranged in the box body. The circuit assembly is arranged in the box body. The circuit assembly is integrated with a battery temperature acquisition circuit, a battery voltage acquisition circuit, a heating temperature acquisition circuit and a heating circuit, the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit are all electrically connected with the battery assembly, and the heating circuit is used for heating the battery assembly. The heating temperature acquisition circuit is used for acquiring the temperature of the battery assembly processed by the heating circuit, and the temperature acquisition circuit and the voltage acquisition circuit are used for acquiring the information of the battery assembly. The battery management system is electrically connected with the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit. According to the battery equipment, the integration degree is improved, the processing efficiency is conveniently improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery equipment, and in particular to a battery equipment and a preparation method thereof. Background Art

[0002] Lithium-ion batteries have the characteristics of small size, light weight, large capacity, high power density, high energy density, wide applicable temperature range and long cycle life. Their use meets green environmental protection requirements and has been widely used in the field of electric vehicles.

[0003] In the battery equipment in the related art, a PTC heating plate is generally used to electrically heat the battery assembly, and the voltage and temperature signal sampling of the battery is usually performed using an FPC harness. The PTC heating plate needs to be connected using a harness, which is difficult to integrate with the FPC. Therefore, the PTC heating plate is arranged with separate circuits. That is, the PTC heating plate is designed separately from the voltage and temperature signal sampling of the battery, and the two operate independently, making the structure of the battery equipment more complex, the assembly cumbersome, the cost higher, and the degree of integration low. Summary of the invention

[0004] The main purpose of the present invention is to provide a battery device and a preparation method, aiming to solve the technical problem that the voltage and temperature signal sampling of the PTC heating plate and the battery are designed separately, which makes the structure of the battery device more complex, the assembly is cumbersome, the cost is high, and the degree of integration is low.

[0005] In order to achieve the above-mentioned object of the invention, a first aspect of the present invention provides a battery device.

[0006] A battery device, comprising:

[0007] Box;

[0008] A battery assembly, wherein the battery assembly is disposed in the box;

[0009] A circuit assembly, wherein the circuit assembly is arranged in the box, and the circuit assembly integrates a battery temperature acquisition circuit, a battery voltage acquisition circuit, a heating temperature acquisition circuit and a heating circuit, wherein the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit are all electrically connected to the battery assembly, the heating circuit is used to heat the battery assembly, the heating temperature acquisition circuit is used to acquire the temperature of the battery assembly after being processed by the heating circuit, and the temperature acquisition circuit and the voltage acquisition circuit are used to acquire information of the battery assembly; and

[0010] A battery management system is electrically connected to the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit respectively.

[0011] In one embodiment, the battery device also includes a signal acquisition connector, which is electrically connected to the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit respectively. The signal acquisition connector is arranged in the battery management system and is electrically connected to the battery management system.

[0012] In one of the embodiments, the box includes a main body and a cover, the cover is disposed on the top of the main body, and part of the circuits of the circuit assembly are disposed on a side of the cover away from the main body.

[0013] In one of the embodiments, the main body includes a wiring harness bracket assembly, and a wiring space for collecting the wiring harness of the line assembly is provided in the wiring harness bracket assembly.

[0014] In one embodiment, the wiring harness bracket assembly includes a first wiring harness bracket, a second wiring harness bracket and a third wiring harness bracket, the first wiring harness bracket is connected to one end of the cover body, the second wiring harness bracket is connected to the other end of the cover body, and the third wiring harness bracket is arranged between the first wiring harness bracket and the second wiring harness bracket.

[0015] In one embodiment, the battery assembly includes a plurality of battery cell stacks, and the plurality of battery cell stacks are horizontally arranged in the box;

[0016] The third wiring harness bracket is arranged between two adjacent groups of battery cell stacks.

[0017] In one embodiment, the main body further comprises a first end plate, a second end plate and a side plate, the first end plate is arranged opposite to the second end plate, one end of the side plate is connected to the first end plate, and the other end is connected to the second end plate;

[0018] A clamping portion is provided on a side of the third wiring harness bracket facing the side plate, and the clamping portion is clamped on the side plate.

[0019] In one embodiment, an electrical connector is provided on the wiring harness bracket assembly, and the electrical connector includes a first part and a second part, the first part and the second part are arranged at an angle, the first part is electrically connected to the battery assembly, and the second part is electrically connected to the line assembly.

[0020] In one embodiment, the circuit assembly includes a first circuit and a second circuit that are electrically connected, and the first circuit is located on a side of the cover body away from the main body;

[0021] The second line passes through the wiring space and is electrically connected to the battery assembly, and the cross-sectional area of ​​the first line is smaller than the cross-sectional area of ​​the second line.

[0022] A second aspect of the present invention provides a method for manufacturing a battery device, comprising the following steps:

[0023] Providing a line assembly and a wiring harness bracket assembly, and inserting the line assembly into a wiring space in the wiring harness bracket assembly;

[0024] Providing an electrical connector, and arranging the electrical connector on the wiring harness support assembly;

[0025] Providing a battery assembly, and electrically connecting the first portion of the electrical connector to the tab of the battery assembly, and electrically connecting the second portion of the electrical connector to the circuit assembly;

[0026] A battery management system is provided, and the circuit assembly is electrically connected to the battery management system.

[0027] Beneficial effects:

[0028] In the battery device of the present invention, the circuit assembly integrates a battery temperature acquisition circuit, a battery voltage acquisition circuit, a heating temperature acquisition circuit and a heating circuit. The battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit are all electrically connected to the battery assembly. The heating circuit is used to heat the battery assembly. The heating temperature acquisition circuit is used to collect the temperature of the battery assembly after being processed by the heating circuit, and the temperature acquisition circuit and the voltage acquisition circuit are used to collect information of the battery assembly. The battery management system is electrically connected to the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit respectively. That is, the battery device collects information of the battery assembly through the battery temperature acquisition circuit and the battery voltage acquisition circuit, and the battery temperature acquisition circuit and the battery voltage acquisition circuit are integrated with the heating temperature acquisition circuit and the heating circuit into a circuit assembly, realizing the integrated setting of the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit, so that the battery device has the functions of heating the battery assembly, collecting the temperature of the battery assembly after the heating treatment of the heating circuit, and collecting the information of the battery assembly at the same time, so that the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit are integrated into an integrated design, which improves the integration degree of the battery equipment and makes the battery equipment compact in structure, which is conducive to simplifying the structure of the battery equipment, facilitating improving the processing efficiency and reducing the cost, and at the same time avoiding the separate setting of the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit, which may cause the wiring to be messy, which is conducive to saving the assembly process of the battery equipment, improving the assembly efficiency, and facilitating saving the assembly labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a battery device according to an embodiment of the present invention.

[0030] Figure 2 It is a structural schematic diagram of a hidden cover of a battery device according to an embodiment of the present invention.

[0031] Figure 3 It is a schematic structural diagram of a third wiring harness bracket according to an embodiment of the present invention.

[0032] Figure 4 4 is a cross-sectional view of a third wire harness bracket according to an embodiment of the present invention.

[0033] in:

[0034] 100, box body; 110, main body; 120, cover body; 121, first harness bracket; 122, second harness bracket; 123, third harness bracket; 1231, clamping part; 124, electrical connector; 1241, first part; 1242, second part; 130, first end plate; 140, second end plate; 150, side plate;

[0035] 200. Battery assembly;

[0036] 300, circuit assembly; 310, battery temperature acquisition circuit; 320, battery voltage acquisition circuit; 330, heating temperature acquisition circuit; 340, heating circuit; 350, first circuit; 360, second circuit;

[0037] 400. Battery management system;

[0038] 500. Signal acquisition connector.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] like Figures 1 to 4As shown, in some embodiments, a battery device includes a box 100, a battery assembly 200, a circuit assembly 300 and a battery management system 400. The battery assembly 200 is arranged in the box 100. The circuit assembly 300 is arranged in the box 100, and the circuit assembly 300 integrates a battery temperature acquisition circuit 310, a battery voltage acquisition circuit 320, a heating temperature acquisition circuit 330 and a heating circuit 340. The battery temperature acquisition circuit 310, the battery voltage acquisition circuit 320, the heating temperature acquisition circuit 330 and the heating circuit 340 are all electrically connected to the battery assembly 200, and the heating circuit 340 is used to heat the battery assembly 200. The heating temperature acquisition circuit 330 is used to collect the temperature of the battery assembly 200 after being processed by the heating circuit 340, and the temperature acquisition circuit and the voltage acquisition circuit are used to collect information of the battery assembly 200. The battery management system 400 is electrically connected to the battery temperature acquisition circuit 310, the battery voltage acquisition circuit 320, the heating temperature acquisition circuit 330 and the heating circuit 340 respectively.

[0045] It should be noted that the battery device collects information of the battery assembly 200 through the battery temperature acquisition circuit 310 and the battery voltage acquisition circuit 320, and the battery temperature acquisition circuit 310 and the battery voltage acquisition circuit 320 are integrated with the heating temperature acquisition circuit 330 and the heating circuit 340 into the circuit assembly 300, realizing the integrated setting of the battery temperature acquisition circuit 310, the battery voltage acquisition circuit 320, the heating temperature acquisition circuit 330 and the heating circuit 340, so that the battery device has the functions of heating the battery assembly 200, collecting the temperature of the battery assembly 200 heated by the heating circuit 340, and collecting the temperature of the battery assembly 200. 0 information function, so that the battery temperature acquisition circuit 310, the battery voltage acquisition circuit 320, the heating temperature acquisition circuit 330 and the heating circuit 340 are integrated into an integrated design, which improves the integration level of the battery equipment, makes the battery equipment structure compact, is conducive to simplifying the structure of the battery equipment, is convenient to improve processing efficiency and reduce costs, and at the same time avoids the battery temperature acquisition circuit 310, the battery voltage acquisition circuit 320, the heating temperature acquisition circuit 330 and the heating circuit 340 are separately set up, which is easy to cause the line routing to be messy, which is conducive to saving the assembly process of the battery equipment, improving the assembly efficiency, and saving the assembly labor cost.

[0046] In some embodiments, the battery assembly 200 includes multiple groups of battery cell stacks. Multiple groups of battery cell stacks are horizontally arranged in the box 100. That is, multiple battery cells are horizontally arranged in the box 100. In this way, the tabs between the battery cells can be welded without the need for busbar connection, which reduces the number of parts and assembly processes of the battery equipment, thereby significantly reducing the manufacturing cost. In addition, the horizontally arranged battery cell stack can better utilize the space in the box 100, so that the battery equipment can accommodate more battery cells at the same volume, thereby improving the energy storage capacity of the battery.

[0047] In some embodiments, the box 100 is configured as a shell of a battery device to protect the components inside the box 100. The box 100 may be a square box.

[0048] like Figure 1 As shown, specifically, the box body 100 includes a main body 110 and a cover body 120. The cover body 120 is covered on the top of the main body 110. The cover body 120 and the main body 110 enclose a receiving space for receiving the battery assembly 200. Specifically, the cover body 120 is detachably arranged on the top of the main body 110, so as to facilitate the installation and removal of the battery assembly 200.

[0049] Specifically, part of the circuit of the circuit assembly 300 is disposed on the side of the cover 120 away from the main body 110. More specifically, part of the circuit of the circuit assembly 300 is disposed on the upper surface of the cover 120. That is, part of the circuit of the circuit assembly 300 is exposed outside the box 100.

[0050] It should be noted that the exposed circuit assembly 300 is easier to observe and inspect, so that potential problems of the circuit assembly 300, such as damage, aging or poor contact, can be discovered in time, so that timely repair and replacement can be performed to reduce the possibility of failure.

[0051] In some embodiments, the main body 110 includes a wiring harness support assembly (not shown in the figure). The wiring harness support assembly is provided with a wiring space for the wiring harness of the acquisition circuit assembly 300. The wiring harness support assembly provides a dedicated wiring space for the wiring harness of the acquisition circuit assembly 300, so that the wiring harness can be arranged in an orderly manner in the wiring space, which is convenient for the integrated design of the circuit assembly 300.

[0052] Specifically, the wiring harness bracket assembly may be a plastic bracket, which is light in weight and can insulate the line assembly 300 in the wiring space.

[0053] like Figure 2As shown, in some embodiments, the wire harness bracket assembly includes a first wire harness bracket 121, a second wire harness bracket 122, and a third wire harness bracket 123. The first wire harness bracket 121 is connected to one end of the cover body 120, and the second wire harness bracket 122 is connected to the other end of the cover body 120. The third wire harness bracket 123 is disposed between the first wire harness bracket 121 and the second wire harness bracket 122.

[0054] It should be noted that the first wiring harness bracket 121, the second wiring harness bracket 122 and the third wiring harness bracket 123 jointly provide a stable support structure for the circuit assembly 300, ensuring that the position of the circuit assembly 300 inside the battery device is fixed to prevent the circuit assembly 300 from shaking or shifting.

[0055] In some embodiments, the body 110 further includes a first end plate 130, a second end plate 140 and a side plate 150, wherein the first end plate 130 is disposed opposite to the second end plate 140. One end of the side plate 150 is connected to the first end plate 130, and the other end is connected to the second end plate 140.

[0056] Specifically, the side plate 150 may be a liquid cooling plate, which is used to cool the battery assembly 200 to prevent the battery assembly 200 from being overheated, thereby affecting the normal operation of the battery assembly 200. In other embodiments, the exposed circuit assembly 300 may also be disposed on the liquid cooling plate.

[0057] Specifically, a clamping portion 1231 is provided on one side of the third harness bracket 123 facing the side plate 150, and the clamping portion 1231 is clamped to the side plate 150. A plurality of clamping portions 1231 may be provided. The plurality of clamping portions 1231 are arranged at intervals along the length direction of the third linear bracket, so that the third harness bracket 123 is clamped to the side plate 150 more stably.

[0058] Specifically, the third harness bracket 123 is disposed between two adjacent groups of battery cell stacks, so that the harness assembly in the third harness bracket 123 can be electrically connected to the battery cell stacks.

[0059] like Figure 3 and Figure 4 As shown, in some embodiments, the wiring harness support assembly is provided with an electrical connector 124. The electrical connector 124 includes a first portion 1241 and a second portion 1242, and the first portion 1241 and the second portion 1242 are arranged at an angle. The first portion 1241 is electrically connected to the battery assembly 200, and the second portion 1242 is electrically connected to the circuit assembly 300. Specifically, the electrical connector 124 can be embedded in the wiring harness support assembly.

[0060] Specifically, the first portion 1241 and the second portion 1242 may be vertically disposed.

[0061] The harness support assembly may be sawtooth-shaped. The first portion 1241 of the electrical connector 124 is located on the upper surface of the sawtooth, so that the first portion 1241 can be electrically connected to the tab of the battery assembly 200. The second portion 1242 of the electrical connector 124 is located on the side of the sawtooth.

[0062] Specifically, the electrical connector 124 may be an aluminum busbar, which has good electrical conductivity and stability, and can ensure that the current transmission between the battery assembly 200 and the circuit assembly 300 is stable and reliable.

[0063] The first part 1241 of the aluminum bar is welded to the nickel sheet of the battery cell of the battery assembly 200. The second part 1242 of the aluminum bar is welded to the circuit assembly 300, and then glue is applied after welding. More specifically, the welding method can be ultrasonic welding.

[0064] like Figure 2 As shown, in some embodiments, the circuit assembly 300 includes an electrically connected first circuit 350 and a second circuit 360. The first circuit 350 is located on the side of the cover 120 away from the main body 110. The first circuit 350 can be the part of the circuit assembly 300 exposed to the box 100.

[0065] Specifically, the second line 360 ​​is arranged in the wiring space and is electrically connected to the battery assembly 200. The second line 360 ​​is located inside the box 100. The cross-sectional area of ​​the first line 350 is smaller than the cross-sectional area of ​​the second line 360. That is, the line assembly 300 inside the box 100 can use thicker cable wires. The line assembly 300 outside the box 100 can use thinner cable wires.

[0066] It should be noted that, under normal working conditions, current is transmitted to or output from the battery assembly 200 through the line assembly 300. Thicker cables are used inside the box 100 and can withstand larger currents because thicker cables usually have lower resistance, which means that less heat is generated on the cables when current passes through, reducing the risk of heat generation.

[0067] When a short circuit occurs, the current will increase instantly. Since thicker cables and wires are used inside the box 100, it can withstand larger short-circuit currents and is not easy to overheat. In contrast, the circuit assembly 300 outside the box 100 uses thinner cables and wires, and its resistance is relatively large. According to Ohm's law, when the current increases, a large amount of heat will be generated on the thin wires, causing the wire temperature to rise rapidly. Since the thin wires are located outside the box 100, even if overheating occurs, it is not easy to transfer heat to the battery cells inside the box 100, thereby avoiding the situation of burning the battery cells inside the module. In addition, the thicker internal cables and wires can better maintain stability during short circuits, reducing further failures caused by overheating, melting or damage of the wires. Weak points in the internal sampling of the module can be avoided to ensure the safety of the battery cells.

[0068] In some embodiments, the heating circuit 340 heats the battery assembly 200 to ensure that the battery assembly 200 has a suitable operating temperature, which is beneficial for the battery assembly 200 to maintain good charging and discharging performance, and is beneficial for the safe use of the battery assembly 200, so that the battery equipment can be used in low temperature environments such as high-cold areas or winter, thereby improving the applicability of the battery equipment.

[0069] Specifically, the heating circuit 340 may be a PTC (Positive Temperature Coefficient) thermistor. PTC has the characteristic that resistance increases with increasing temperature and is suitable for battery heating control. It can automatically adjust current when a certain temperature is reached to achieve safe and effective heating.

[0070] In some embodiments, the heating temperature acquisition circuit 330 is used to collect the temperature of the battery assembly 200 after being processed by the heating circuit 340, so as to facilitate the monitoring of the temperature of the battery assembly 200 after being processed by the heating circuit 340, and further ensure that the battery assembly 200 has a suitable operating temperature. If the temperature after being processed by the heating circuit 340 is abnormal, it is convenient to take certain measures on the heating circuit 340 to ensure the safe use of the battery assembly 200 and avoid damage to the battery assembly 200 caused by abnormal temperature.

[0071] It should be noted that the heating temperature acquisition circuit 330 can feed back the temperature data to the system so that the system can comprehensively analyze and manage the working state of the battery and optimize the performance and efficiency of the battery. By collecting and monitoring the heating temperature, the temperature of the battery assembly 200 can be accurately controlled. If a temperature abnormality is detected, such as too high or too low temperature, the battery management system 400 can take timely measures, such as adjusting the working state of the heating circuit 340, stopping heating or issuing an alarm, etc., to ensure the safe use of the battery assembly 200. This can avoid damage to the battery assembly 200 caused by abnormal temperature, extend the service life of the battery assembly 200, and improve the reliability and safety of the battery equipment.

[0072] In some embodiments, the battery temperature acquisition circuit 310 and the battery voltage acquisition circuit 320 are both suitable for acquiring information of the battery assembly 200, so as to monitor the battery assembly 200. For example, the battery temperature acquisition circuit 310 is suitable for acquiring the temperature of the battery assembly 200. The battery voltage acquisition circuit 320 acquires the voltage of the battery assembly 200. The battery temperature acquisition circuit 310 can acquire the temperature information of the battery assembly 200 to facilitate the transmission of the temperature information of the battery assembly 200, and the battery voltage acquisition circuit 320 can acquire the voltage information of the battery assembly 200 to facilitate the transmission of the voltage information of the battery assembly 200, so as to ensure the safe use of the battery assembly 200.

[0073] The heating circuit 340 , the heating temperature acquisition circuit 330 , the battery temperature acquisition circuit 310 and the battery voltage acquisition circuit 320 may be insulated from each other to ensure that the circuit assembly 300 is reliable.

[0074] In some embodiments, the battery management system 400 is electrically connected to the battery temperature acquisition circuit 310 , the battery voltage acquisition circuit 320 , the heating temperature acquisition circuit 330 , and the heating circuit 340 , respectively.

[0075] It should be noted that the battery management system 400 (Battery Management System, BMS for short) is used to manage and control the charging and discharging process of the battery to ensure the safe, stable and efficient operation of the battery.

[0076] The main board of the battery management system 400 is the core control unit of the BMS, which is usually responsible for the coordination and management of the entire battery equipment. The functions of the BMS main board include data acquisition and monitoring, battery status estimation, control strategy formulation and communication functions. Data acquisition and monitoring: Collect battery parameters such as voltage, current, temperature, and monitor the working status of the battery in real time. Battery status estimation: Estimate the remaining power, health status, etc. of the battery based on the collected data. Control strategy formulation: Develop a reasonable charging and discharging control strategy based on the battery status and user needs. Communication function: Communicate with external devices, such as data exchange with the vehicle's control system, charger, etc.

[0077] The slave board of the BMS is an auxiliary unit of the main board, usually responsible for the implementation of specific functions or monitoring and controlling some battery cells. The specific functions of the slave board may vary depending on the design and application requirements of the BMS.

[0078] The main board transmits data and exchanges commands with the slave board through the communication line. The slave board feeds back the collected battery information to the main board. The main board formulates corresponding control strategies based on this information and sends commands to the slave board to achieve accurate management of the battery. For example, in a battery device, there may be multiple slave boards responsible for monitoring battery components 200 in different areas. The slave boards transmit the battery data of their respective areas to the main board. The main board analyzes and makes decisions based on these data, and then instructs the slave board to control the corresponding battery cells, such as adjusting the charging current, balancing the battery power, etc. The collaborative mode of the main board and the slave board can improve the management efficiency and accuracy of the BMS and ensure the safe and reliable operation of the battery equipment.

[0079] Specifically, the circuit assembly 300 integrating the battery temperature acquisition circuit 310, the battery voltage acquisition circuit 320, the heating temperature acquisition circuit 330 and the heating circuit 340 can be directly connected to the BMS, which can save the cost of sampling connectors and line-to-line connectors, and also reduce the risk of poor contact between male and female connectors. This method has strong signal transmission reliability.

[0080] Specifically, components with overcurrent protection functions such as fuses or resistors can be set on the wiring harness assembly to achieve functional protection of the battery assembly 200 and the BMS to prevent short circuit burning.

[0081] In some embodiments, the battery device further includes a signal acquisition connector 500. The signal acquisition connector 500 is electrically connected to the battery temperature acquisition circuit 310, the battery voltage acquisition circuit 320, the heating temperature acquisition circuit 330 and the heating circuit 340 respectively, and the signal acquisition connector 500 is disposed in the battery management system 400 and is electrically connected to the battery management system 400.

[0082] It should be noted that the signal acquisition connector 500 is electrically connected to the heating temperature acquisition circuit 330, the battery temperature acquisition circuit 310 and the battery voltage acquisition circuit 320 respectively. Then the temperature of the battery assembly 200 heated by the heating circuit 340 acquired by the heating temperature acquisition circuit 330, the information of the battery assembly 200 acquired by the battery temperature acquisition circuit 310 and the information of the battery assembly 200 acquired by the battery voltage acquisition circuit 320 can all be transmitted through the signal acquisition connector 500, saving the battery temperature acquisition circuit 310 and the battery voltage acquisition circuit 320 from the need for corresponding acquisition connectors, further simplifying the structure of the battery device and reducing costs. The signal acquisition connector 500 can be connected to other components, avoiding the heating temperature acquisition circuit 330, the battery temperature acquisition circuit 310 and the battery voltage acquisition circuit 320 from being connected to the corresponding structures in sequence, effectively improving the assembly efficiency of the battery device.

[0083] The signal transmitted by the signal acquisition connector 500 includes the temperature of the battery assembly 200 heated by the heating circuit 340 collected by the heating temperature acquisition circuit 330, the information of the battery assembly 200 collected by the battery temperature acquisition circuit 310, and the information of the battery assembly 200 collected by the battery voltage acquisition circuit 320, and the transmission is achieved using the same signal acquisition connector 500.

[0084] In other embodiments, a method for preparing a battery device, applied to the above-mentioned battery device, comprises the following steps:

[0085] S1. Provide a line component and a wiring harness bracket component, and insert the line component into the wiring space in the wiring harness bracket component.

[0086] S2. Provide an electrical connector and place the electrical connector on the wiring harness bracket assembly.

[0087] Specifically, the electrical connector can be disposed on the wiring harness support assembly by means of embedding.

[0088] S3. Provide a battery assembly, and electrically connect the first part of the electrical connector to the tab of the battery assembly, and electrically connect the second part of the electrical connector to the circuit assembly.

[0089] Specifically, the first part of the electrical connector is welded to the tab of the battery assembly by laser welding. The second part of the electrical connector is welded to the tab of the battery assembly by laser welding.

[0090] Specifically, the first portion of the electrical connector can be press-fitted with the tab of the battery assembly, and the second portion of the electrical connector can be press-fitted with the tab of the battery assembly.

[0091] S4. Provide a battery management system and electrically connect the circuit assembly to the battery management system.

[0092] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery device, characterized in that: include: Box; A battery assembly, wherein the battery assembly is disposed in the box; A circuit assembly, wherein the circuit assembly is arranged in the box, and the circuit assembly integrates a battery temperature acquisition circuit, a battery voltage acquisition circuit, a heating temperature acquisition circuit and a heating circuit, wherein the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit are all electrically connected to the battery assembly, the heating circuit is used to heat the battery assembly, the heating temperature acquisition circuit is used to acquire the temperature of the battery assembly after being processed by the heating circuit, and the temperature acquisition circuit and the voltage acquisition circuit are used to acquire information of the battery assembly; and A battery management system is electrically connected to the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit respectively.

2. The battery device according to claim 1, characterized in that: The battery device also includes a signal acquisition connector, which is electrically connected to the battery temperature acquisition circuit, the battery voltage acquisition circuit, the heating temperature acquisition circuit and the heating circuit respectively. The signal acquisition connector is arranged in the battery management system and is electrically connected to the battery management system.

3. The battery device according to claim 1, characterized in that: The box body comprises a main body and a cover body, wherein the cover body is arranged on the top of the main body, and part of the circuits of the circuit assembly are arranged on the side of the cover body away from the main body.

4. The battery device according to claim 3, characterized in that: The main body comprises a wiring harness support assembly, and a wiring space for collecting the wiring harness of the line assembly is arranged in the wiring harness support assembly.

5. The battery device according to claim 4, characterized in that: The wiring harness bracket assembly includes a first wiring harness bracket, a second wiring harness bracket and a third wiring harness bracket, the first wiring harness bracket is connected to one end of the cover body, the second wiring harness bracket is connected to the other end of the cover body, and the third wiring harness bracket is arranged between the first wiring harness bracket and the second wiring harness bracket.

6. The battery device according to claim 5, characterized in that: The battery assembly comprises a plurality of battery cell stacks, and the plurality of battery cell stacks are horizontally arranged in the box; The third wiring harness bracket is arranged between two adjacent groups of battery cell stacks.

7. The battery device according to claim 5, characterized in that: The main body further comprises a first end plate, a second end plate and a side plate, wherein the first end plate is arranged opposite to the second end plate, one end of the side plate is connected to the first end plate, and the other end is connected to the second end plate; A clamping portion is provided on a side of the third wiring harness bracket facing the side plate, and the clamping portion is clamped on the side plate.

8. The battery device according to claim 4, characterized in that: The wiring harness bracket assembly is provided with an electrical connector, which includes a first portion and a second portion, wherein the first portion and the second portion are arranged at an angle, the first portion is electrically connected to the battery assembly, and the second portion is electrically connected to the line assembly.

9. The battery device according to claim 4, characterized in that: The circuit assembly includes a first circuit and a second circuit that are electrically connected, and the first circuit is located on a side of the cover body away from the main body; The second line passes through the wiring space and is electrically connected to the battery assembly, and the cross-sectional area of ​​the first line is smaller than the cross-sectional area of ​​the second line.

10. A method for preparing a battery device, applied to the battery device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Providing a line assembly and a wiring harness bracket assembly, and inserting the line assembly into a wiring space in the wiring harness bracket assembly; Providing an electrical connector, and arranging the electrical connector on the wiring harness support assembly; Providing a battery assembly, and electrically connecting the first portion of the electrical connector to the tab of the battery assembly, and electrically connecting the second portion of the electrical connector to the circuit assembly; A battery management system is provided, and the circuit assembly is electrically connected to the battery management system.

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