Battery

Abstract

The utility model provides a battery, the battery includes shell, upper cover, battery cell, CCS module and BMS module, upper cover is covered on the shell to form the accommodation space, battery cell is arranged in the accommodation space, CCS module includes support and first circuit board, first circuit board is arranged on the support towards the battery cell side, BMS module is arranged between support and upper cover, BMS module is arranged on the upper cover, and BMS module is arranged on the upper cover. The BMS module is connected with the upper cover through a heat conduction structure. According to the battery, the BMS module and the upper cover are connected through the heat conduction structure; meanwhile, the CCS module adopts the structural arrangement of the bracket and the first circuit board, so that the first circuit board and the BMS module are separated by the bracket, and electronic devices on the first circuit board are prevented from being influenced by heat of the BMS module; therefore, the problem that the temperature acquisition precision and the service life of the battery cell are affected by heat generated by the BMS module in the battery in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of battery-related technology, and more specifically, to a battery. Background Technology

[0002] In modern automobiles, energy storage systems, and portable electronic devices, battery systems, especially 12V lead-acid and lithium-ion batteries, are widely used to provide stable and reliable power. These battery systems typically include a Battery Management System (BMS), which is responsible for monitoring battery performance, protecting the battery from damage, and optimizing battery efficiency. In the BMS's wake-up state, the heat generated can affect the accuracy of sensors such as NTC (Negativiral Temperature Coefficient) thermistors in measuring the cell temperature.

[0003] Especially in compact battery pack designs, the BMS is typically located above the battery cells, in direct or indirect contact with them. This structural layout can lead to the following problems during battery operation, particularly under high load or rapid charge / discharge:

[0004] Thermal conduction effects: The BMS generates heat during operation, which is transferred to the battery cells through direct contact or thermal radiation, causing the cell temperature to rise. High-temperature environments accelerate internal chemical reactions within the battery cells, shortening their lifespan and potentially leading to safety issues.

[0005] Temperature measurement bias: The heat generated by the BMS can directly affect the measurement results of the NTC thermistor, causing the NTC sensor to read a temperature higher than the actual cell temperature. This measurement bias may lead to incorrect triggering of cell management strategies, such as overheat protection or current limiting control, thereby affecting the performance of the battery system and the user experience.

[0006] As can be seen from the above, current batteries suffer from the problem that the heat generated by the BMS module affects the accuracy of temperature acquisition in the battery cell and the lifespan of the battery cell. Utility Model Content

[0007] The main objective of this invention is to provide a battery that solves the problem in existing batteries where the heat generated by the BMS module affects the accuracy of temperature acquisition and the lifespan of the battery cell.

[0008] To achieve the above objectives, according to one aspect of the present invention, a battery is provided, the battery including a casing, a top cover, a battery cell, a CCS module and a BMS module, the top cover covering the casing to form an accommodating space, the battery cell being disposed inside the accommodating space, the CCS module including a bracket and a first circuit board, the first circuit board being disposed on the bracket facing the battery cell, the BMS module being disposed between the bracket and the top cover, and the BMS module being connected to the top cover through a heat-conducting structure.

[0009] Furthermore, the battery also includes a temperature sensor, which is mounted on the first circuit board.

[0010] Furthermore, the first circuit board is a flexible printed circuit board, and the first circuit board is snapped and fixed on the bracket; and / or the projection of the first circuit board on the cell is arranged in the middle region of the cell along the length direction of the housing.

[0011] Furthermore, the temperature sensor is in contact with the battery cell; and / or multiple temperature sensors are provided, spaced apart, to detect the temperature at multiple locations on the battery cell.

[0012] Furthermore, the thermally conductive structure is made of thermally conductive adhesive. The BMS module is bonded to the side of the top cover facing the battery cell by thermally conductive adhesive, and a thermally conductive adhesive layer is formed between the top cover and the BMS module.

[0013] Furthermore, the BMS module includes a second circuit board, which is bonded to the top cover. Along the height direction of the housing, the second circuit board and the first circuit board are disposed on both sides of the bracket.

[0014] Furthermore, the second circuit board is a rigid circuit board; and / or a shunt is provided on the side of the second circuit board facing the battery cell, the shunt being used to measure the current.

[0015] Furthermore, heat dissipation fins are provided on the side of the top cover that is away from the battery cell.

[0016] Furthermore, the projections of the heat dissipation fins and the heat-conducting structure on the top cover at least partially overlap.

[0017] Furthermore, the battery also includes a heat insulation structure disposed between the first circuit board and the bracket.

[0018] By applying the technical solution of this utility model, the battery of this application adopts a heat-conducting structure to connect the BMS module and the top cover, and the top cover provides auxiliary heat conduction, which is beneficial to improving the heat dissipation efficiency of the BMS module. At the same time, the CCS module of this application adopts a structure of bracket and first circuit board, so that the first circuit board and the BMS module are separated by the bracket. The bracket is beneficial to the heat insulation effect, avoiding the influence of the heat of the BMS module on the electronic components on the first circuit board, which would lead to inaccurate information collected by the electronic components on the first circuit board. The structure of this application effectively isolates the heat transfer between the BMS module and the first circuit board, thereby ensuring the accuracy of cell temperature information collection and ensuring the stable operation of the cell.

[0019] The first circuit board of this application has the function of collecting cell temperature information. The first circuit board is set on the side of the bracket facing the cell. The structure of the first circuit board is conducive to directly collecting cell temperature information and further improving the accuracy of cell temperature collection. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A three-dimensional structural schematic diagram of the battery of this utility model is shown;

[0022] Figure 2 A three-dimensional structural diagram of the internal structure of the battery of this utility model is shown;

[0023] Figure 3 A front view of the internal structure of the battery of this utility model is shown;

[0024] Figure 4 A side view of the internal structure of the battery of this invention is shown.

[0025] The above figures include the following reference numerals:

[0026] 10. Housing; 20. Top cover; 30. Battery cell; 40. CCS module; 410. Bracket; 420. First circuit board; 50. Second circuit board; 510. Shunt; 60. Thermally conductive adhesive layer; 70. Heat sink fins. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] To address the problem that heat generated by the BMS module in existing batteries affects the accuracy of temperature acquisition and the lifespan of the cells, this application provides a battery.

[0031] The battery in this application is a square aluminum-cased battery.

[0032] like Figures 1 to 4 As shown, the battery includes a housing 10, a top cover 20, a battery cell 30, a CCS module 40, and a BMS module. The top cover 20 covers the housing 10 to form an accommodating space. The battery cell 30 is disposed inside the accommodating space. The CCS module 40 (integrated busbar) includes a bracket 410 and a first circuit board 420. The first circuit board 420 is disposed on the bracket 410 facing the battery cell 30. The BMS module is disposed between the bracket 410 and the top cover 20. The BMS module and the top cover 20 are connected by a heat-conducting structure.

[0033] The top cover 20 is welded and fixed to the housing 10. Multiple battery cells 30 are provided, and the multiple battery cells 30 are stacked along the width of the housing 10. The stacked multiple battery cells 30 are housed inside the housing 10.

[0034] The length direction of the housing 10 is Figure 1 As shown in the X direction, the width direction of the housing 10 is... Figure 1 As shown in the Y direction, the height direction of the shell 10 is... Figure 1 The Z direction is shown.

[0035] Specifically, the battery of this application uses a thermally conductive structure to connect the BMS module and the top cover 20, with the top cover 20 providing auxiliary heat conduction, which is beneficial to improving the heat dissipation efficiency of the BMS module. At the same time, the CCS module 40 of this application adopts a structure of bracket 410 and first circuit board 420, so that the first circuit board 420 and the BMS module are separated by bracket 410. The bracket 410 is beneficial to achieving a heat insulation effect, avoiding the influence of the heat of the BMS module on the electronic components on the first circuit board 420, which would lead to inaccurate information collected by the electronic components on the first circuit board 420. The structural design of this application effectively isolates the heat transfer between the BMS module and the first circuit board 420, thereby ensuring the accuracy of temperature information collection of the cell 30 and ensuring the stable operation of the cell 30.

[0036] The bracket 410 is made of insulating and heat-insulating plastic material. The bracket 410 is fixed on the top of the battery cell 30 and is fixedly connected to the housing 10 so that the bracket 410 is stably set inside the housing 10.

[0037] The first circuit board 420 of this application has the function of collecting temperature information of the battery cell 30. The first circuit board 420 is disposed on the side of the bracket 410 facing the battery cell 30. The structural arrangement of the first circuit board 420 is conducive to directly collecting data from the battery cell 30 and to further improving the accuracy of temperature data collection of the battery cell 30.

[0038] In this embodiment, the first circuit board 420 is a flexible printed circuit board, i.e., an FPC, and is snapped onto the bracket 410. The bracket 410 has a snap-fit ​​structure for snapping the first circuit board 420 onto the bracket 410. The snap-fit ​​bracket 410 and the first circuit board 420 facilitate the installation of the first circuit board 420 onto the bracket 410, thereby improving assembly efficiency.

[0039] Of course, it is not limited to the bracket 410 being snapped and fixed to the first circuit board 420. Alternatively, the first circuit board 420 can be glued to the bracket 410 or fixed to the bracket 410 by fasteners, such as bolts.

[0040] In this embodiment, the battery also includes a temperature sensor, which is disposed on the side of the first circuit board 420 facing the battery cell 30. The temperature sensor is an NTC (Negativiral Temperature Coefficient) thermistor or similar sensor, used to collect the temperature of the battery cell 30. The fact that the temperature sensor is disposed on the side of the first circuit board 420 facing the battery cell 30 and is in contact with the battery cell 30 to collect the temperature helps to further improve the accuracy of temperature acquisition.

[0041] In this embodiment, a temperature sensor abuts against the battery cell 30 to collect temperature data from the battery cell 30. Specifically, multiple temperature sensors are provided, spaced apart on the first circuit board 420. This application uses multiple temperature sensors to detect the temperature at multiple locations on the battery cell 30. By collecting temperature data at multiple locations on the battery cell 30, the accuracy of temperature data acquisition is improved. The multiple temperature sensors can be spaced apart along the length of the housing 10, along the width of the housing 10, or simultaneously along both the length and width of the housing 10.

[0042] like Figures 2 to 4 As shown, the projection of the first circuit board 420 onto the battery cell 30 is located in the middle region of the battery cell 30.

[0043] The first circuit board 420 is positioned in the middle of the upper side of the battery cell 30, allowing the temperature sensor mounted on the first circuit board 420 to collect temperature data of the middle area of ​​the top side of the battery cell 30, thus ensuring more accurate core temperature information of the battery cell 30. The centrally located first circuit board 420 also facilitates installation and fixation.

[0044] Specifically, along the length of the housing 10, the projection of the first circuit board 420 onto the battery cell 30 is equal to the distance between the two ends of the battery cell 30.

[0045] In this embodiment, the thermally conductive structure uses thermally conductive adhesive, and the BMS module is bonded to the side of the upper cover 20 facing the battery cell 30 by the thermally conductive adhesive. The thermally conductive adhesive forms a thermally conductive adhesive layer 60 between the upper cover 20 and the BMS module.

[0046] Specifically, thermally conductive adhesive is used between the top cover 20 and the BMS module to transfer the heat generated when the BMS module is woken up to the top cover 20 through the thermally conductive adhesive layer 60. Since the top cover 20 is made of metal, it can conduct heat away to cool the BMS module.

[0047] The thermally conductive adhesive layer 60 not only serves to bond and fix the BMS module, but also provides thermal conductivity and insulation.

[0048] like Figures 2 to 4 As shown, the BMS module includes a second circuit board 50, which is bonded to the top cover 20. Along the height direction of the housing 10, the second circuit board 50 and the first circuit board 420 are disposed on both sides of the bracket 410.

[0049] The second circuit board 50 is a rigid printed circuit board (PCB), which ensures the structural stability of the circuit board. In this embodiment, a thermally conductive adhesive layer 60 is provided between the second circuit board 50 and the upper cover 20. This allows the heat generated by the components on the second circuit board 50 to be transferred to the upper cover 20 for heat dissipation, thereby improving the heat dissipation efficiency of the second circuit board 50 and thus enhancing the operational stability of the second circuit board 50.

[0050] Specifically, this application adopts a dual-circuit board structure, optimizes the internal structural layout of the housing 10, and improves the control effect of the control end.

[0051] In this embodiment, a shunt 510 is provided on the side of the second circuit board 50 facing the battery cell 30. The shunt 510 is used to measure the current. The shunt 510 is positioned facing the battery cell 30, which helps the shunt 510 to accurately measure the current of the battery cell 30, thereby improving the efficiency of battery performance monitoring and fault diagnosis.

[0052] like Figures 1 to 4 As shown, the top cover 20 has heat dissipation fins 70 on the side opposite to the battery cell 30.

[0053] By providing heat dissipation fins 70 on the upper cover 20, the heat dissipation area of ​​the upper cover 20 is increased, thereby improving the heat dissipation efficiency. Specifically, the heat dissipation fins 70 are ribs provided on the upper cover 20, and multiple ribs are provided to form heat dissipation fins 70 located on the side of the upper cover 20 away from the battery cell 30.

[0054] Specifically, the heat from the BMS module is transferred to the top cover 20 through the thermally conductive colloid. The top cover 20 improves heat dissipation efficiency by setting heat dissipation fins 70. The overall structure facilitates the heat dissipation efficiency of the BMS module, reduces the temperature of the electronic components on the BMS module, improves the performance range of the battery cell 30, and ensures the stable operation of the battery.

[0055] In this embodiment, heat dissipation fins 70 and thermally conductive adhesive are respectively disposed on both sides of the upper cover 20, and the projections of heat dissipation fins 70 and thermally conductive adhesive on the upper cover 20 at least partially overlap, so as to facilitate rapid heat dissipation and increase heat dissipation efficiency.

[0056] The projections of the heat sink fins 70 and the thermally conductive adhesive on the top cover 20 can be either partially overlapping or completely overlapping. It is understood that the projection of the heat sink fins 70 on the top cover 20 can be located inside the projection area of ​​the thermally conductive adhesive on the top cover 20, or the projections of the two can be partially misaligned.

[0057] In this embodiment, the battery further includes a heat insulation structure disposed between the first circuit board 420 and the bracket 410. The heat insulation structure can be a structure with heat insulation and cushioning properties, such as foam or rubber. By providing a heat insulation structure between the first circuit board 420 and the bracket 410, a heat insulation effect can be further achieved, which helps to further prevent the heat from the BMS module from being transferred towards the first circuit board 420, thus helping to ensure the stability of the operation of the first circuit board 420.

[0058] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0059] The battery in this application uses a thermally conductive structure to connect the BMS module and the top cover 20, with the top cover 20 providing auxiliary heat conduction, which is beneficial to improving the heat dissipation efficiency of the BMS module. Simultaneously, the CCS module 40 of this application employs a structure of bracket 410 and a first circuit board 420, separating the first circuit board 420 and the BMS module by the bracket 410. The bracket 410 effectively insulates against heat, preventing the electronic components on the first circuit board 420 from being affected by the heat from the BMS module, thus avoiding inaccurate information collected by the electronic components on the first circuit board 420. This structural design effectively isolates heat transfer between the BMS module and the first circuit board 420, thereby ensuring the accuracy of temperature information collection from the cell 30 and guaranteeing the stable operation of the cell 30.

[0060] The first circuit board 420 of this application has the function of collecting temperature information of the battery cell 30. The first circuit board 420 is disposed on the side of the bracket 410 facing the battery cell 30. The structural arrangement of the first circuit board 420 is conducive to directly collecting data from the battery cell 30 and to further improving the accuracy of temperature data collection of the battery cell 30.

[0061] In this application, the heat of the BMS module is transferred to the top cover 20 through thermally conductive colloid. The top cover 20 improves heat dissipation efficiency by setting heat dissipation fins 70. The overall structure facilitates the heat dissipation efficiency of the BMS module, reduces the temperature of the components on the BMS module, improves the performance range of the cell 30, and ensures the stable operation of the battery.

[0062] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0063] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0064] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery, characterized by, The battery comprises: a shell (10); an upper cover (20) covering the shell (10) to form a containing space; an electric core (30) arranged inside the containing space; a CCS module (40) comprising a bracket (410) and a first circuit board (420) arranged on the bracket (410) towards the electric core (30); a BMS module arranged between the bracket (410) and the upper cover (20), and connected with the upper cover (20) through a heat conduction structure.

2. The battery of claim 1, wherein, The battery further comprises a temperature sensor arranged on the first circuit board (420) towards the electric core (30).

3. The battery of claim 2, wherein: the temperature sensor is in abutment with the electric core (30); and / or a plurality of temperature sensors are arranged at intervals for detecting the temperature at multiple positions of the electric core (30).

4. The battery of claim 1, wherein: the first circuit board (420) is a flexible printed circuit board, and is clamped and fixed on the bracket (410); and / or a projection of the first circuit board (420) on the electric core (30) is arranged in a middle region of the electric core (30) along the length direction of the shell (10).

5. The battery of claim 1, wherein, The heat conduction structure is a heat conduction adhesive, and the BMS module is adhered to the side of the upper cover (20) towards the electric core (30) through the heat conduction adhesive, and the heat conduction adhesive forms a heat conduction adhesive layer (60) between the upper cover (20) and the BMS module.

6. The battery of claim 5, wherein, The BMS module comprises a second circuit board (50) adhered to the upper cover (20), and the second circuit board (50) and the first circuit board (420) are arranged on both sides of the bracket (410) along the height direction of the shell (10).

7. The battery of claim 6, wherein: the second circuit board (50) is a rigid circuit board; and / or a shunt (510) is arranged on the side of the second circuit board (50) towards the electric core (30), and is used for measuring current.

8. The battery of claim 1, wherein, The side of the upper cover (20) away from the electric core (30) is provided with a heat dissipation fin (70).

9. The battery of claim 8, wherein: the heat dissipation fin (70) and the heat conduction structure at least partially overlap on the upper cover (20).

10. The battery of any one of claims 1 to 9, wherein, The battery further comprises an insulation structure arranged between the first circuit board (420) and the bracket (410).

Images