Energy balance battery pack for mixing use of sodium battery and lithium battery
By designing an energy balance battery pack, using AB type AFE acquisition chip to independently manage voltage platforms of different cell types, and using shock absorption pads and shock absorption devices to perform shock absorption protection and heat dissipation management of batteries, the compatibility and integration problems of sodium batteries and lithium iron phosphate batteries are solved, and the efficient and reliable use of the battery pack is achieved.
Patent Information
- Application Number
- CN202311157056.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-07
- Publication Date
- 2025-03-07
AI Technical Summary
The existing battery pack cannot achieve the mixing and matching of sodium batteries and lithium iron phosphate batteries, resulting in inconvenience in use and problems with compatibility and integration between battery systems, especially the mismatch between the battery voltage platform and the charge and discharge rate.
An energy balance battery pack is designed. Through the integrated battery pack base case, protective cover and integrated battery module, the AB type AFE acquisition chip is used to independently manage voltage platforms of different battery cell types to solve the problem of mismatch in charge and discharge rates, and the battery's shock absorption protection and heat dissipation management is carried out through shock absorption pads and shock absorption devices.
The mix and match between sodium batteries and lithium iron phosphate batteries is realized, which solves the compatibility and integration problems between the battery system, ensures the normal heat dissipation and protection of the battery, and improves the convenience and reliability of the battery pack.
Smart Images
Figure CN119581702A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of energy balance for mixed use of batteries, and in particular to an energy balance battery pack for mixed use of sodium batteries and lithium batteries. Background Art
[0002] Sodium battery is a new type of battery technology that uses sodium ions (Na+) instead of lithium ions (Li+) to store charge. Sodium ions are lightweight, low-cost metal ions with higher chemical energy density than lithium ions. Sodium batteries can use different electrolytes such as solid electrolytes, lithium metal electrolytes or organic electrolytes. Sodium batteries have the advantages of high energy density, long service life and low cost.
[0003] Lithium iron phosphate battery is a new type of lithium battery technology, which uses iron ions (Fe3+) instead of lithium ions (Li+) to store charge. Compared with lithium-ion batteries, lithium iron phosphate batteries have the advantages of higher safety, longer service life and lower cost.
[0004] In lithium iron phosphate batteries, iron ions are embedded in the cathode material, rather than in the electrolyte as in lithium-ion batteries. This makes lithium iron phosphate batteries safer because iron ions do not form lithium salts in the electrolyte like lithium ions do, which can lead to the risk of battery short circuits and fires.
[0005] In addition, lithium iron phosphate batteries also have a longer service life and lower cost. This is because iron ions can exist stably in the positive electrode, and iron can be quickly charged and discharged, thereby extending the service life of the battery. In addition, lithium iron phosphate batteries do not need to use toxic lithium metal to make the positive electrode, so it can reduce the consumption of lithium resources and environmental pollution.
[0006] The existing battery pack contains a single battery. When sodium batteries and lithium iron phosphate batteries are needed, different battery packs need to be carried and they cannot be mixed and used, which is inconvenient. However, sodium batteries and lithium iron phosphate batteries have different operating voltages, charge and discharge characteristics and control requirements. When mixed and used, it is necessary to resolve compatibility and integration issues between battery systems, especially there may be mismatches in battery voltage platforms and charge and discharge rates between sodium batteries and lithium batteries. Summary of the invention
[0007] Based on this, the purpose of the present invention is to provide an energy-balanced battery pack that uses a mixture of sodium batteries and lithium batteries to solve the technical problems raised in the above background technology.
[0008] To achieve the above object, the present invention provides the following technical solutions:
[0009] An energy balance battery pack for mixed use of sodium batteries and lithium batteries, comprising an integrated battery pack base shell, a protective cover and an integrated battery assembly, wherein the protective cover is located on the top of the integrated battery pack base shell, and a shock absorbing device for absorbing shock on the top of the integrated battery assembly is provided on the top of the protective cover.
[0010] Specifically, the integrated battery pack base shell is evenly provided with battery cell placement grooves for placing the integrated battery assembly, and the outer walls on both sides of the bottom of the integrated battery pack base shell are provided with fixing frames for fixing to the use equipment.
[0011] Specifically, the integrated battery assembly includes a plurality of sodium batteries, a plurality of lithium iron phosphate batteries, a type AFE acquisition chip, a type B AFE acquisition chip and a main chip MUC, a plurality of the sodium batteries are electrically connected to the type A AFE acquisition chip, a plurality of the lithium iron phosphate batteries are electrically connected to the type B AFE acquisition chip, and the type A AFE acquisition chip and the type B AFE acquisition chip are electrically connected to the main chip MUC.
[0012] Specifically, the present technical solution is that a plurality of the sodium batteries and a plurality of the lithium iron phosphate batteries are cross-distributed inside the battery cell placement grooves, and a shock-absorbing pad is vertically distributed between every two battery cell placement grooves in the integrated battery pack base shell, and the outer walls on both sides of the shock-absorbing pad are connected to the outer walls of the sodium battery or the lithium iron phosphate battery, and heat dissipation holes are evenly opened on the shock-absorbing pad.
[0013] Specifically, the battery cell placement groove is a longitudinal arrangement groove, and the sodium battery and the lithium iron phosphate battery are alternately arranged in sequence in the battery cell placement groove.
[0014] Specifically, the shock absorbing device includes a shock absorbing rod, a shock absorbing spring and a fixed block which are symmetrically distributed on the top of the protective cover. The top of the shock absorbing rod is fixed to the top of the protective cover. The shock absorbing spring is sleeved on the outside of the shock absorbing rod and its top is fixed to the top of the protective cover. The bottom of the shock absorbing spring is connected to the fixed block, and the bottoms of the two fixed blocks are connected to shock absorbing protective plates.
[0015] Specifically, the length of the shock absorbing spring is greater than the length of the shock absorbing rod, and the shock absorbing rod moves back and forth on the shock absorbing spring.
[0016] Specifically, the technical solution of the present invention is provided with an up-and-down motion connecting assembly between the two shock absorbing devices at the inner top of the protective cover, and the up-and-down motion connecting assembly includes a connecting rod and a fixed seat, the top of the fixed seat is fixed to the inner top of the protective cover, the connecting rod is symmetrically located on both sides of the fixed seat, one end of the connecting rod is connected to one side of the fixed seat through a rotating shaft, and the other side of the connecting rod is fixed to the outer wall of the fixed block close to the inner side.
[0017] Specifically, the bottom of the shock-absorbing protective plate is connected to the top of the sodium battery and the lithium iron phosphate battery and the length is smaller than the top diameter of the protective cover.
[0018] In summary, the present invention mainly has the following beneficial effects:
[0019] 1. In view of the problems raised in the background technology, this application improves the design of the battery management system and uses an AB-type AFE acquisition chip to manage different cell voltage platforms separately, thereby solving the problem of mixing different cell types in the same battery pack and solving the problem of mismatched charge and discharge rates.
[0020] 2. A shock-absorbing pad is provided between the sodium battery and the lithium iron phosphate battery placed inside the housing of the integrated battery pack base to provide shock-absorbing protection, thereby preventing the sodium battery and the lithium iron phosphate battery from rubbing and shaking back and forth, protecting the battery and providing a heat dissipation through hole on the shock-absorbing pad to ensure normal heat dissipation of the battery;
[0021] 3. By arranging a shock-absorbing device and an up-and-down moving connecting assembly at the top of the protective cover, the top of the sodium battery and the lithium iron phosphate battery located inside the integrated battery pack base shell are shock-absorbed. The top of the integrated battery assembly abuts against and squeezes the shock-absorbing protective plate. The shock-absorbing protective plate drives the fixed block and the connecting rod to move upward, squeezing the shock-absorbing spring. The reaction force of the shock-absorbing spring squeezes downward, reducing the upward bumping and shaking of the integrated battery assembly, performing shock absorption, and preventing the integrated battery pack from shaking up and down due to external force. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 A three-dimensional diagram of the shell structure of the integrated battery pack base of the present invention;
[0023] Figure 2 It is a side view of the shock absorbing device at the bottom of the protective cover of the present invention;
[0024] Figure 3 It is a schematic diagram of the whole shock absorbing device and the up-and-down motion connection assembly of the present invention;
[0025] Figure 4 It is a system block diagram of the present invention.
[0026] In the figure: 1. integrated battery pack base shell; 2. protective cover; 3. shock absorbing device; 31. shock absorbing rod; 32. shock absorbing spring; 33. fixing block; 34. shock absorbing protective plate; 4. battery cell placement slot; 41. shock absorbing pad; 411. heat dissipation hole; 5. fixing frame; 61. connecting rod; 62. fixing seat; 63. rotating shaft. DETAILED DESCRIPTION
[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0028] The following describes an embodiment of the present invention based on its overall structure.
[0029] Example
[0030] See also Figure 1-4 The present invention provides a technical solution: an energy balance battery pack for mixed use of sodium batteries and lithium batteries, comprising an integrated battery pack base shell 1, a protective cover 2 and an integrated battery assembly, the protective cover 2 is located at the top of the integrated battery pack base shell 1, a shock absorbing device 3 for shock absorbing the top of the integrated battery assembly is arranged at the top of the protective cover 2, battery cell placement grooves 4 for placing the integrated battery assembly are uniformly arranged inside the integrated battery pack base shell 1, and fixing frames 5 for fixing with a use device are arranged on the outer walls on both sides of the bottom of the integrated battery pack base shell 1; a plurality of sodium batteries and a plurality of lithium iron phosphate batteries are cross-distributed inside the battery cell placement grooves 4, the battery cell placement grooves 4 are longitudinally arranged grooves, the sodium batteries and the lithium iron phosphate batteries are alternately and cross-arranged in the battery cell placement grooves 4 in sequence, and shock absorbing pads 41 are vertically distributed between every two battery cell placement grooves 4 of the integrated battery pack base shell 1, the outer walls on both sides of the shock absorbing pads 41 are connected to the outer walls of the sodium batteries or the lithium iron phosphate batteries, and heat dissipation through holes 411 are uniformly penetrated on the shock absorbing pads 41.
[0031] It should be noted that this application improves the design of the battery management system and uses an AB-type AFE acquisition chip to manage different cell voltage platforms separately, thereby solving the problem of mixed use of different cell types in the same battery pack and solving the problem of mismatched charge and discharge rates.
[0032] Furthermore, a shock-absorbing pad 41 is provided between the sodium battery and the lithium iron phosphate battery placed inside the integrated battery pack base housing 1 to provide shock-absorbing protection, thereby preventing the sodium battery and the lithium iron phosphate battery from swaying back and forth due to friction, thereby protecting the battery and providing a heat dissipation through hole 411 on the shock-absorbing pad 41 to ensure normal heat dissipation of the battery;
[0033] Furthermore, by arranging a shock absorbing device 3 and an up-and-down movement connecting assembly at the top of the protective cover 2, the top of the sodium battery and the lithium iron phosphate battery located inside the integrated battery pack base shell 1 is shock-absorbing to prevent the integrated battery pack from shaking up and down due to external force.
[0034] See also Figure 1 and 4 The integrated battery assembly includes a number of sodium batteries, a number of lithium iron phosphate batteries, a type AFE acquisition chip, a type B AFE acquisition chip and a main chip MUC. The number of sodium batteries are electrically connected to the type AFE acquisition chip, the number of lithium iron phosphate batteries are electrically connected to the type B AFE acquisition chip, and the type A AFE acquisition chip and the type B AFE acquisition chip are electrically connected to the main chip MUC.
[0035] It should be noted that in this embodiment, the integrated battery assembly can be uniformly managed according to the different characteristics of the sodium battery and the lithium iron phosphate battery. The main components of the battery management system are the main control chip and two different types of analog front-end AFE acquisition chips and related circuits. AFE is an automatic troubleshooting acquisition chip, which is a technology used in autonomous intelligent devices such as robots. It can automatically identify and diagnose the cause of the fault when the device fails or an abnormal situation occurs, and take corresponding measures to ensure the normal operation of the device. The AFE chip usually integrates the signal acquisition and processing functions of multiple sensors and processors, and can monitor and analyze the sound, vibration, temperature and other signals of the device in real time during operation to diagnose potential problems; at the same time, it interfaces with other devices and sensors to realize the exchange and sharing of data between devices, has higher accuracy and reliability, and can be faster and more accurate. Identify and resolve equipment failures, thereby improving equipment reliability and safety. In this embodiment, two different types of AFE acquisition chips are mainly classified and managed for different battery cell types, such as: Type A AFE acquisition chip manages sodium batteries, and Type B AFE acquisition chip manages lithium iron phosphate batteries; then the two types of acquisition chips manage the collected information uniformly by the main chip MUC. At this time, the main control chip manages the A and B type AFE acquisition chips according to the different characteristics of the battery cells, such as: when the parameters of the sodium battery of the A type AFE acquisition chip reach the protection, the protection function of the A type AFE acquisition chip is prioritized, such as: charging with a constant current of 1C until the highest single cell of the lithium iron phosphate battery reaches 3.60V or the highest single cell of the sodium battery reaches 3.9V, and then charging with a constant current of 0.05C, and stopping charging when the highest single cell of the lithium iron phosphate battery reaches 3.65V or the highest single cell of the sodium battery reaches 4.0V, whichever comes first;
[0036] Furthermore, when the two batteries are unbalanced, affecting the discharge or charging rate, the battery management system balances the batteries and transfers the energy of the high-voltage battery to the low-voltage battery to achieve balance. At the same time, the AB acquisition chip has an active balancing function that can balance the two battery cells.
[0037] See also Figure 2 and 3 The shock absorbing device 3 includes a shock absorbing rod 31, a shock absorbing spring 32 and a fixing block 33 which are symmetrically distributed on the inner top of the protective cover 2. The top of the shock absorbing rod 31 is fixed to the inner top of the protective cover 2. The shock absorbing spring 32 is sleeved on the outside of the shock absorbing rod 31 and its top is fixed to the inner top of the protective cover 2. The bottom of the shock absorbing spring 32 is connected to the fixing block 33. The bottoms of the two fixing blocks 33 are connected to a shock absorbing protective plate 34. The bottom of the shock absorbing protective plate 34 is connected to the top of the sodium battery and the lithium iron phosphate battery and its length is less than the inner top diameter of the protective cover 2. The length of the shock spring 32 is greater than that of the shock absorbing rod 31, and the shock absorbing rod 31 moves back and forth on the shock absorbing spring 32; an up and down motion connecting component is arranged between the two shock absorbing devices 3 at the top inside the protective cover 2, and the up and down motion connecting component includes a connecting rod 61 and a fixing seat 62, the top of the fixing seat 62 is fixed to the top inside the protective cover 2, and the connecting rod 61 is symmetrically located on both sides of the fixing seat 62, one end of the connecting rod 61 is connected to one side of the fixing seat 62 through a rotating shaft 63, and the other side of the connecting rod 61 is fixed to the outer wall of the fixing block 33 close to the inner side.
[0038] It should be noted that, in this embodiment, a shock absorbing device 3 and an up-and-down motion connecting assembly are provided at the top of the protective cover 2 to reduce the shock of the top of the sodium battery and the lithium iron phosphate battery located inside the integrated battery pack base housing 1, thereby preventing the integrated battery pack from shaking up and down due to external forces;
[0039] Furthermore, the integrated battery pack base shell 1 is fixed to the external equipment through the fixing frames 5 on the outer walls on both sides of the bottom. The integrated battery assembly is located in the battery cell placement slot 4 in the integrated battery pack base shell 1. When the integrated battery assembly is shaken upward by external force, the top of the integrated battery assembly abuts against the shock-absorbing protective plate 34, and the shock-absorbing protective plate 34 drives the fixed block 33 and the connecting rod 61 to move upward, squeezing the shock-absorbing spring 32. The reaction force of the shock-absorbing spring 32 squeezes downward, reducing the upward shaking of the integrated battery assembly, performing shock absorption, and protecting the battery.
[0040] The working principle of the present invention is:
[0041] When in use, the sodium batteries and lithium iron phosphate batteries are cross-distributed inside the battery cell placement slot 4, the outer walls on both sides of the shock-absorbing pad 41 located between the battery and the lithium iron phosphate battery are connected to the outer walls of the sodium battery or the lithium iron phosphate battery, a number of sodium batteries are electrically connected to the type A AFE acquisition chip, a number of lithium iron phosphate batteries are electrically connected to the type B AFE acquisition chip, the type A AFE acquisition chip and the type B AFE acquisition chip are electrically connected to the main chip MUC, the protective cover 2 is covered on the top of the integrated battery pack base shell 1, the bottom of the shock-absorbing protective plate 34 is connected to the top of the integrated battery assembly, the protective cover 2 is fixed to the integrated battery pack base shell 1 by bolts, and the integrated battery pack base shell 1 is fixed to the external device by the fixing frame 5 on the outer walls on both sides of the bottom. The present application improves the design of the battery management system and uses an AB-type AFE acquisition chip to manage different battery cell voltage platforms separately, thereby solving the problem of mixed use of different battery cell types in the same battery pack and solving the problem of mismatched charge and discharge rates. A shock-absorbing pad 41 is provided between the sodium battery and the lithium iron phosphate battery placed inside the integrated battery pack base shell 1 for shock-absorbing protection to prevent the sodium battery and the lithium iron phosphate battery from rubbing and shaking back and forth, thereby protecting the battery and providing a heat dissipation through hole 411 on the shock-absorbing pad 41 to ensure normal heat dissipation of the battery. A shock-absorbing device 3 and an up-and-down moving connecting assembly are provided at the top of the protective cover 2 to dampen the top of the sodium battery and the lithium iron phosphate battery located inside the integrated battery pack base shell 1. The top of the integrated battery assembly abuts against and squeezes the shock-absorbing protective plate 34. The shock-absorbing protective plate 34 drives the fixed block 33 and the connecting rod 61 to move upward, squeezing the shock-absorbing spring 32. The reaction force of the shock-absorbing spring 32 squeezes downward, reducing the upward bumping and shaking of the integrated battery assembly, damping the shock, and preventing the integrated battery pack from shaking up and down due to external force.
[0042] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.
Claims
1. An energy balance battery pack for mixed use of sodium batteries and lithium batteries, comprising an integrated battery pack base shell (1), a protective cover (2) and an integrated battery assembly, characterized in that: The protective cover (2) is located on the top of the integrated battery pack base shell (1), and a shock absorbing device (3) for absorbing shock on the top of the integrated battery assembly is arranged on the top of the protective cover (2).
2. An energy-balanced battery pack for mixed use of sodium batteries and lithium batteries according to claim 1, characterized in that: The integrated battery pack base shell (1) is evenly provided with battery cell placement grooves (4) for placing the integrated battery assembly, and the outer walls on both sides of the bottom of the integrated battery pack base shell (1) are provided with fixing frames (5) for fixing to a use device.
3. An energy-balanced battery pack for mixed use of sodium batteries and lithium batteries according to claim 1, characterized in that: The integrated battery assembly includes a plurality of sodium batteries, a plurality of lithium iron phosphate batteries, a type AFE acquisition chip, a type B AFE acquisition chip and a main chip MUC. A plurality of the sodium batteries are electrically connected to the type AFE acquisition chip, a plurality of the lithium iron phosphate batteries are electrically connected to the type B AFE acquisition chip, and the type A AFE acquisition chip and the type B AFE acquisition chip are electrically connected to the main chip MUC.
4. An energy-balanced battery pack for mixed use of sodium batteries and lithium batteries according to claim 2, characterized in that: A plurality of the sodium batteries and a plurality of the lithium iron phosphate batteries are cross-distributed inside the battery cell placement slots (4), and a shock absorbing pad (41) is vertically distributed between every two battery cell placement slots (4) of the integrated battery pack base shell (1), and the outer walls on both sides of the shock absorbing pad (41) are connected to the outer walls of the sodium batteries or the lithium iron phosphate batteries, and the shock absorbing pad (41) is evenly penetrated with heat dissipation through holes (411).
5. An energy-balanced battery pack for mixed use of sodium batteries and lithium batteries according to claim 4, characterized in that: The battery cell placement groove (4) is a longitudinally arranged groove, and the sodium batteries and lithium iron phosphate batteries are arranged alternately and crosswise in the battery cell placement groove (4).
6. The energy balance battery pack for mixed use of sodium batteries and lithium batteries according to claim 1, characterized in that: The shock absorbing device (3) comprises a shock absorbing rod (31), a shock absorbing spring (32) and a fixed block (33) which are symmetrically distributed on the top of the protective cover (2); the top of the shock absorbing rod (31) is fixed to the top of the protective cover (2); the shock absorbing spring (32) is sleeved on the outside of the shock absorbing rod (31) and the top of the shock absorbing spring (32) is fixed to the top of the protective cover (2); the bottom of the shock absorbing spring (32) is connected to the fixed block (33); and the bottoms of the two fixed blocks (33) are connected to shock absorbing protective plates (34).
7. An energy-balanced battery pack for mixed use of sodium batteries and lithium batteries according to claim 6, characterized in that: The length of the shock absorbing spring (32) is greater than the length of the shock absorbing rod (31), and the shock absorbing rod (31) moves back and forth on the shock absorbing spring (32).
8. The energy balance battery pack for mixed use of sodium batteries and lithium batteries according to claim 6, characterized in that: An up-and-down motion connection assembly is arranged between the two shock absorbing devices (3) at the top of the inner part of the protective cover (2), and the up-and-down motion connection assembly comprises a connecting rod (61) and a fixing seat (62), the top of the fixing seat (62) is fixed to the inner top of the protective cover (2), the connecting rod (61) is symmetrically located on both sides of the fixing seat (62), one end of the connecting rod (61) is connected to one side of the fixing seat (62) via a rotating shaft (63), and the other side of the connecting rod (61) is fixed to the outer wall of the fixing block (33) close to the inner side.
9. The energy balance battery pack for mixed use of sodium batteries and lithium batteries according to claim 6, characterized in that: The bottom of the shock-absorbing protective plate (34) is connected to the top of the sodium battery and the lithium iron phosphate battery, and its length is smaller than the inner top diameter of the protective cover (2).